Alexander percy rushforth



(No Model.)

A. P. RUSHPORTH. CUPOLA 0R BLAST PURNAGE.

` No. 509,450. Patented Nov. 28,1893.

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Wlesses UNITED STATES PATENT OFFICE.

l ALEXANDER PERCY RUSHFORTH, OF CANNING TOWN, ENGLAND.

CUPOLA OR BLAST FURNACE.

SPECIFICATION forming part of Letters Patent No. 509,450, dated November28, 1893.

Application filed March 14,1893. Serial No.465.911. (No model.)

To all whom it may concern:

Be it known that I, ALEXANDER PEECY RUSHFORTH, engineer, a subject ofthe Queen of Great Britain, residing at 181 Barking Road, Canning Town,in the county of Essex, England, have invented certain new and useful"fore admitting the same to the cupola or blast furnace. For this purposeI employ, in connection with the cupola or blast furnace, a receiverinto which the molten metal runs as it is produced in the cupola orblast furnace, and in the interior of this receiver and above thesurface `of the molten metal contained therein, Iplace one or more pipesor rows of pipes and connect such pipes at one end with the main blastpipe from the blowing machine or blowing engine, and the other end withthe air belt or pipe leading to the tuyeres of the cupola or blastfurnace. The pipes 1n the aforesaid receiver become highly heated,partly by contact with the hot gases contained in or passing through thereceiver, and partly by heat radiated from the In Olten metal, and theblast of air becomes correspondingly heated in its passage through theaforesaid heatedr pipes in the receiver.

In the drawings hereto annexed Figure 1 1s a vertical section of acupola with my improvements applied thereto and Fig? a horizontalsection taken on line X X of Fig. 1. i

A is the body of the cupola constructed 1n the usual way, B the airbelt, C the tuyere holes for the admission of air from the belt B to theinterior of the cupola.

D is the usual charging opening and E a passage through which the moltenmetal flows from the bottom of the cupola.

F is the receiver above mentioned into which the molten metal liows fromthe openin E.

gGris the tapping hole through which the molten metal can be withdrawnfrom the receiver F as and when required.

H is a coil of pipe which may be of cast iron or Jany other suitablematerial adapted to bearthe great heat to which 1t is subjected.

This coil of pipe is supported in the upper part 'of the receiver F bybearers I, or in any other convenient and suitable way. The end H of thecoil of pipe I-I is connected to the air belt B and the other end H2 tothe main blast pipe of the blowing machine or blowing engine.

` Fig. 3 is a section of the pipe Il taken on line Y Y of Fig. 2 loolingin the direction of the arrow, showing the connection between the upperand lower coils of the pipe.

The lower part of the receiver F containing fthe molten metal may beconstructed of iire brick .I bound together by an iron casing K. Theupper part may consist of a continuation upward of the iron casing Klined with iirebrick organister for example and covered with slabs offire clay. An opening is preferably made in the top for convenience ofaccess to, or examination of, the pipe H or of the receiver. Thisopening may be closed with a fire clay plug L. The hotgases which escapethrough the opening Einto the receiver F are by preference returned tothe cupola at a convenient point by means of a pipezM.

Itwill now be understood that when the cupola is at work, the pipe Hwill vbe highly heated first bythe hot gases escaping from the lowerpart of the cupola through the opening E and passing back to the cupolathrough the pipe M, and secondly by heat radiated to it from the moltenmetal N collected in the lower part of the receiver F, and that the airblast, in its passage through the said pipe H length of the pipe I-Ishould be much greater for a blast furnace than for a cupola. Thisincreased length may be obtained by making the upper part of thereceiverhigher and increasing the number of coils of the pipe contained in it.And it will be understood that whether applying the invention to aicupola or to a blast furnace,l do not confine myself IOO '2 p 509,450A tto the coiled form of the pipe H as the same may be arranged in any Waythat may be most convenient or suitable; for example the said pipe maybe composed of a series of vertical or inclined pipes of any suitableheight connected together by U shaped'bends at top and bottom so as toform a continuous serpentine or zigzag pipe arranged around the interiorof the upper part of the receiver F.`

'The receiver F is shown of circular form in plan but it may be made ofsquare, octagonal or any other shape as may be found most convenient. I'am aware that it is not new to employ receivers in connection withcupolas and blast furnaces to receive and contain the molten metaltherefrom, and I make no claim to the use of such receivers except whenemployed in connection witha pipe or pipes for heating the air blast inaccordance with my inven'- go l the air belt B about the chamber A, thetuyeres C,- they airv blast pipe extending through the l upper pait ofthe receiver and connecting with the air belt, and the passage M,leading from the top of the receiver above the blast pipe to the chamberA, substantially as de- Intestimony that I claim the foregoingvas myinvention I have signed my name in presence of two subscribingWitnesses.

` ALEXANDER PERCY RUSHFORTH.

Witnesses: y

STEPHEN EDWARD GUNYON, WILLIAM ANDERSON SMITH.

